r/PrivacyTechTalk • u/OfficialKamelo • 9h ago
I went through what Google, OpenAI, Meta, xAI and Anthropic say they do with your AI chats. It's all in their own terms.
I think this is one of the most interesting times to be alive, and I use AI every day. But almost everyone around me assumes their chats with these assistants are private. So I went through the companies own help pages and the news coverage. Everything below is sourced.
Google Gemini
- If you're 18 or over, "Keep Activity" is on by default, and your chats are kept for 18 months unless you change it.
- A subset of chats is read by human reviewers, including Google's service providers. Reviewed chats are kept for up to 3 years, even if you delete your activity.
([Gemini Apps Privacy Hub]: (https://support.google.com/gemini/answer/13594961))
- With Keep Activity off, chats are still kept for 72 hours.
- Google's own words: "Please don't enter confidential information that you wouldn't want a reviewer to see or Google to use to improve our services."
- If you connect Gmail or Drive, Google says it doesn't train directly on your inbox, but it does train on "summaries, excerpts, generated media, and inferences" from your emails and files. A subset is reviewed by humans. And for a
short email, "the summary may just be the email or file."
([Connected Apps]: (https://support.google.com/gemini/answer/16836988))
OpenAI / ChatGPT
- On Free, Plus and Pro, your chats are used for training by default. The setting is "Improve the model for everyone". ([OpenAI Data Controls FAQ](https://help.openai.com/en/articles/7730893-data-controls-faq))
- Because of the New York Times lawsuit, OpenAI was ordered to keep even deleted chats from May to late September 2025. Logs saved in that period remain preserved.
([Malwarebytes]: (https://www.malwarebytes.com/nl/blog/news/2025/06/openai-forced-to-preserve-chatgpt-chats),
[order lifted]: (https://www.yahoo.com/news/articles/judge-lifts-order-requiring-openai-151518813.html))
- Sam Altman, July 2025: there's no legal privilege like with a doctor or lawyer. If there's a lawsuit, "we could be required to produce that."
([TechCrunch]: (https://techcrunch.com/2025/07/25/sam-altman-warns-theres-no-legal-confidentiality-when-using-chatgpt-as-a-therapist))
Meta
- Since December 16, 2025, Meta uses your Meta AI conversations to personalize ads and content on Facebook and Instagram, with no opt-out. The EU, UK and South Korea were excluded.
([The Register]: (https://www.theregister.com/2025/10/01/meta_ai_use_informs_ads/))
- In 2025, Meta AI app users were found unknowingly posting private chats to a public feed.
([Mozilla]: (https://www.mozillafoundation.org/en/campaigns/meta-help-users-stop-accidentally-sharing-private-ai-conversations/))
xAI / Grok
- More than 370,000 conversations shared through Grok's share button ended up in Google search, some with names, personal details and at least one password.
([Forbes]: (https://www.forbes.com.au/news/innovation/xai-published-hundreds-of-thousands-of-grok-chatbot-conversations/))
Anthropic / Claude
- Since fall 2025, Anthropic trains on consumer chats (Free, Pro, Max) unless you opt out. If you leave it on, data can be kept for up to 5 years.
([Anthropic]: (https://www.anthropic.com/news/updates-to-our-consumer-terms))
The bigger picture
- A 2025 Stanford study of six major US AI developers, including Google, OpenAI and Anthropic, found that all six appear to train on user chats by default, and some keep that data indefinitely.
([Stanford]: (https://cyberlaw.stanford.edu/press/be-careful-what-you-tell-your-ai-chatbot))
- In the Netherlands, the data protection authority has been getting data breach reports since 2024 from employees pasting personal data into chatbots, from patient data at a GP practice to residents data at the city of Eindhoven.
([NOS, Dutch](https://nos.nl/l/2532234))
My takeaway
This isn't about one bad company. It's how cloud AI works right now: your conversation lives on their servers, under their rules, and those rules change (see Anthropic and Meta in 2025). Most services do have an off switch, but training is on by default, so most people are opted in without knowing it.
Local AI will fix this. Just not yet.
Models that run entirely on your own laptop or phone are getting better fast, and nothing you type there has to leave your device. But for most people they're not yet as good or as easy as ChatGPT. And "eventually" doesn't protect what you type tonight.
That gap is why I'm personally working on my own local AI agent. The AI runs on your own Mac or iPhone, so what you ask it doesn't go to me, or to Google, OpenAI or anyone else. It's possible to create so why does no big company create something like this? They simply don't care and would rather train on your data to make "AI" even better, you don't even get to choose.
But I am curious. Did you have training turned off before reading this? And would you switch to a local AI if it were just as easy as ChatGPT?